Have you read Shades: The Departed?
Shades is an online free magazine that is well worth reading.
I've directed you to the April issue on the Civil War. If you turn to page 46 you will find an article called "Civil War Costume" which I wrote for the magazine. It's illlustrated with over 30 Civil War era photographs.
Don't miss the other articles in the April issue, they are all excellent. The May issue can be found online as can all other back issues.